Mini Air Cooling Fan air volume and pressure are the effects?

"Mini Air Cooling Fan" air volume and pressure: There are two methods of air volume and pressure, one instrument with wind tunnel testing, the other is a double-box testing method. But for the average user, there is no such device. Only as a reference, ultimately depends on the cooling effect according to data provided by the manufacturer.
"Mini Air Cooling Fan" air flow: air flow refers to the speed of the fan-ventilated area flat plot. Ventilation area is subtracted from the outlet area of ??the projected area at the vortex of the tongue. Plane speed velocity gas flow through the entire plane, the unit is m3 / s. Flat rate constant, the fan impeller diameter, the greater the ventilation area, the greater the amount of wind. "Mini Air Cooling Fanflat rate determined by the rotor speed and air pressure. When the ventilation area must, flat rate, the greater the amount of wind. The larger the amount of wind, the greater the heat absorption of air, the air flow can be transferred with the week can take more heat, fan heat effect is more obvious